amanda knox getting under way right now in italy. She spent four years in prison for murdering her roommate before the con vision was overturned. Gio benitez with the story. Reporter: This morning, amanda knox finds her name, if not herself, front and center in an italian courtroom. Facing a retrial for the charges that she murdered her roommate, meredith kercher. Knox's attorney rejected the notion that knox wasn't there because she knows he's guilty. She's always maintained her innocence. I'm going to keep fighting this. I'm not going to stop fighting this. Reporter: She's endured a roller coaster ride through the italian justice system. She was accused with her then boyfriend, raffaele sollecito, of stabbing kercher to death. This spring, the italian supreme court rejected the decision to free her and ordered the case be retried. By then, she returned to seatle and returned to school. The longer it plays out, the longer it's going to take me to get my life back. And to move on. Reporter: Kercher's family was not in court this morning. Their lawyer says he believes knox is guilty. She understands her friend and roommate's family wants to know how their daughter died. Even as knox herself viows to prove she's not the person who did it. I'm not ever going to accept the idea that anyone can say that I did something that i didn't. It's not okay. Reporter: And over the weekend, kercher's family, which believes knox is guilty, issued a statement asking her not the visit their daughter's grave. If knox is convicted again, there's a slight chance she could be extradited. That would be a big diplomatic fight. Thank you, gio. It would, george. Now daredevil boaters.

This transcript has been automatically generated and may not be 100% accurate.

{"id":20417341,"title":"Amanda Knox Sits Out Her Retrial ","duration":"2:15","description":"Knox says she'll fight to clear her name as an Italian court reopens the murder trial of Meredith Kercher.","url":"/GMA/video/amanda-knox-sits-retrial-20417341","section":"GMA","mediaType":"Default"}